I think there's no need to discuss about Barcelona vs Napoli and Arsenal vs FC Porto, it's a sure win for both Barcelona and Arsenal, Napoli and FC Porto aren't that good compared to last season.
What I think we need to pay attention is PSG vs Real Sociedad and Inter vs Atletico Madrid, I believe most people will think PSG and Inter will win since both of them were strong in the last season, but I believe this time Real Sociedad and Atletico Madrid able to prove themselves even though they're underdog.
I have a slightly different opinion than you. I think the Barca and Napoli pair is quite unpredictable; they are the reigning champions of both the Spanish and Italian leagues. Currently, the form of both Barca and Napoli is not good, but when they face each other, the result is hard to predict. Napoli's style of play remains challenging for teams from England and Spain. Therefore, it's not easy for Barca to overcome Napoli in this round.
I believe there might be a surprise in the PSG and Real Sociedad matchup. Most people rate Real Sociedad lower than PSG, but their form this season has been quite good. I think they are even better than PSG at the moment, not just because they dominate their group with unbeaten performances.
I agree with you, even though Barcelona is the favorite in the match against Napoli, this will not necessarily match expectations because Barcelona is in an unstable condition and Napoli is not an easy team and of course this will be a match that is difficult to predict because the performance of both teams is the same. the same is not very consistent in the domestic league, but even so, I hope Barcelona can win this match because in my opinion, even though Barcelona is unstable, I hope Barcelona can appear surprising in the next match even though they have to fight hard because the first match will be held at Napoli headquarters.
The match between PSG vs Real Sociedad is indeed a match that must be watched carefully because this match is very important for both of them, but even so, it looks like PSG will remain the favorite here because PSG has shown progress, especially in the domestic league, its performance is still consistent, for Real Sociedad this is This is their first time competing in the Champions League but Real Sociedad was able to qualify for the round of 16. This is a good start and now they have to fight hard against a team that has more experience competing in the Champions League.